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<?php |
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namespace Sugarcrm\UpgradeSpec\Version\Graph; |
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use Sugarcrm\UpgradeSpec\Version\OrderedList; |
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use Sugarcrm\UpgradeSpec\Version\Version; |
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final class AdjacencyList implements \ArrayAccess, \IteratorAggregate |
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{ |
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/** |
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* @var array |
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*/ |
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private $container = []; |
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/** |
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* AdjacencyList constructor. |
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* |
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* @param array $edges |
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*/ |
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public function __construct(array $edges = []) |
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{ |
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$versions = new OrderedList(call_user_func_array('array_merge', $edges)); |
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// init container |
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foreach ($versions as $version) { |
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$this->container[(string) $version] = new OrderedList(); |
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} |
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// add edges |
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foreach ($edges as $edge) { |
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$this->container[(string) $edge[0]] = ($this->container[(string) $edge[0]])->addVersions([$edge[1]]); |
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} |
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// add parent edges |
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foreach ($versions as $version) { |
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$minorVersions = $versions->filter(function (Version $minorVersion) use ($version) { |
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return $minorVersion->isChildOf($version); |
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}); |
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// link all minor versions to existing parent versions |
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foreach ($minorVersions as $minorVersion) { |
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$this->container[(string) $minorVersion] = ($this->container[(string) $minorVersion])->addVersions([$version]); |
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} |
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} |
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} |
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/** |
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* @param mixed $offset |
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* @param mixed $value |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->container[(string) $offset] = $value; |
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} |
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/** |
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* @param mixed $offset |
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* |
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* @return bool |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->container[(string) $offset]); |
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} |
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/** |
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* @param mixed $offset |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->container[(string) $offset]); |
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} |
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/** |
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* @param mixed $offset |
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* |
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* @return mixed|null |
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*/ |
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public function offsetGet($offset) |
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{ |
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return isset($this->container[(string) $offset]) ? $this->container[(string) $offset] : null; |
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} |
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/** |
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* Retrieve an external iterator. |
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* |
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* @return \Traversable |
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*/ |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->container); |
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} |
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} |
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